Steering Cylinder Service - Toro Groundsmaster 300 Series Service Manual

Steering Cylinder Service

IMPORTANT: To prevent damage to rod or barrel,
clamp vise on pivot ends only. DO NOT clamp
against smooth rod surface.
1. After removing the cylinder, pump oil out of cylinder
into a drain pan by SLOWLY moving piston in and out
of cylinder bore.
2. Plug the ports and clean the outside of the cylinder.
3. Mount cylinder in a vise so rod end of cylinder is tilted
up slightly. Do not close the vise so firmly that the
cylinder barrel could become distorted.
4. Use a spanner wrench to unscrew (counterclockwise)
head (Fig. 21, Item 2) from barrel (Item 1).
5. Grasp large end of piston rod (Item 4) and use a
twisting and pulling motion to carefully extract piston,
rod, and head from cylinder tube.
6. Securely mount piston, rod, and head into vise so
large nut (Item 6) is easily accessible for removal.
Remove nut by turning it counterclockwise.
7. Remove piston (Item 5). Slide head off of piston rod.
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Groundsmaster 300 Series
8. Remove all seals and O-rings (Item 2).
9. Wash parts in a safe solvent. Dry parts with com-
pressed air. DO NOT wipe them dry with a cloth or paper
as lint and dirt may remain.
10. Carefully inspect internal surface of barrel for dam-
age (deep scratches, out-of-round, etc.). Replace entire
cylinder if barrel is damaged. Inspect head, rod, and
piston for evidence of excessive scoring, pitting, or
wear. Replace any damaged parts.
11. Put a light coating of oil on all new seals, and O-rings.
Install new seals and O-rings.
12. Install head onto piston rod.
13. Install piston onto rod and tighten hex nut to 30 -
34 ft-lb.
14. Put a light coating of oil on all cylinder parts.
15. Slide piston rod assembly into cylinder tube.
16. Install head into tube and tighten by hand to properly
engage threads. Tighten head with a spanner wrench.
Figure 21
Page 8 - 19 Repairs